Apparatus for making latex articles



May 31, 193s. A N, SPNEL 2,119,496

APPARATUS FOR MAKING LATEX ARTICLES Filed May 8, 1936 INVENTOR /KB RAHAMMSPANEL BY Patented May 31,1938 Y 2,119,496

UNITED-[STATES 'PATENT oFFicE APPARATUS'FOR MAKING LATEX ARTICLESAbraham N; Spnel, Rochester, N. Y. ApplicationY May 8, 1936, Serial No.78,593

" s'claims. (C1. 18-41) 'Ihisinventionairelates' tov apparatus formakwith layers` of latex thereon particularly illusing-latex articles.Yj trating a modified type of reinforcement-'gen- Infthef manufactureYof` latex articles, it Vhas erating means for a margin of the article.been the practiceftomakevsuch' articles by dip- The present inventioncan be rapplied to the 5 ping aai'suitably shaped form `into liquidlatex making of. latex bibs or aprons by using the `form 5 Withthe-majorvaxis of the form 'in a vertical 20 illustrated in Figs. l to 4inclusive. This form position;A This practice of 'dipping the'form withis made from metal sheet 2| of commercial stock itsv long axis extendingverticallyhas .been folsuch as stainless steel or aluminum cut to thelowed; because it was' believedy to be necessary general outlineillustrated in Fig. 1.. The upper '10 irl-'order to generatesatisfactory reinforcements portion of the form proper is provided with`an v10 for al1 margins of the article. In the dipping extension 22 (Fig.2) by which the form can be ofxsuchfo'rms, it /is necessary tointroducethe supported while latex is being vdeposited thereon. form slowly intothe latex bath so that the bath On each face of this extension there isattached isnotedisturbedftofthe'pointwhere air bubbles av plate 23terminatingat its lower'. portion in lll-'Will developon .the surfacethereof, 'and it is also an abrupt edge 24, this abrupt edge being posi-A15 necessary-to"Withdrawtheform slowly from the tioned in alinementwiththe upper edge of the latex-bathso-that'a'uniform layer oflatex willform pr0per- The top, bott-,0m and 1eft end maybef-depbsitedfthereonz-Consequently. Where a gin ofthe sheet 2|, as illustrated in Fig. 1 fromnecessarily long `form lisused formaking capes the point 24 to the point25 has a groove 26,

or full length aprons.' the'lengthof time Ierolled or otherwise formedtherein at'the edge k20 Vquired 'forbthe-fo'rm to be dipped into andwithof the sheet as best illustrated in Figs. 2 and 3. drawn fromthelatex bath'becom'es so great that On the right end portion of eachsurface of the the costlof making the article becomes excesformasillustrated in Fig. 1, there is secured a sively high.- AlsoV theIlength of time required projecting knife edge 27 Which'denes the `inside25 for each dip is so vlong that the exposed latex edges of thetierstrings of the resulting bib, the v25 at the surface'- offthe latexbath vhas an opuupper portion of the bib and the neck opening portunityto coagulate forming a highly objectherein. This knife edge is bent tothedesired tionable lm"orskin on the bath surface. shape` and isattached to eaclr surface :of-*the I have discovered that the cost ofproducing right end of the form as shown in Fig. 1, from 30 relativelylong narrow latex articles can be sub-A the point 24 to the point 25.Circular bosses 30 stantially reduced by dipping the article-gen- 28with abrupt edges are attached to each surerating form With its majoraxis in approxiface of the sheet at those points where it is demately ahorizontal position and yet a satisfacsired to develop button holes inthe resulting tory latex article with all of its margins reinbib.forced, can be produced. In making bibs on this form, the form with 35The main feature of the invention relates to its long axis in asubstantially horizontal posinovel forms whereby relatively lons. narrowlatex tion is supported from the extension 22 of the articles can beproduced With a substantial saV- form. While suspended in this position,the form ing in cost. is dipped one or more times into a latex bath oOther features and advantages 0f the nVeIluntil a layer of latex 29 isdeposited on each 40 tion will appear from the detailed description andsurface of the form, At the junction 0f each claims when taken with thedrawing in which plate 23 with the Surface 0f the form and at Fig. 1 isa front elevation of a form on which a the junction of each knife edgewith the form, latex bib or apron can be deposited; Fig- 2 iS ridges oflatex 30 will be developed, while at a section of this last-mentionedform taken on the abrupt edges of these plates and at the knife 45 theline 2-2 of Fig. 1; Fig. 3 is an enlarged edges, lines of weakness willdevelop in the refragmentary section taken on the line 3-3 of sultinglayer. Similarly, latex will accumulate Fig. 1 of a marginal portion ofthe form With a as a reinforcement 3| (Fig. 4) at the junction layer oflatex thereon illustrating the character 0f each boss 28 with the sheet2|. The latex 0f reinforcement developed Hear each edge 0f will alsoaccumulate on thesurface of the grooves 50 the layer; Fig- 4 iS anenlarged section of this to develop reinforcements 32 and 33 of thecharform with a layer of latex on each surface thereacter illustrated inFig. 3. The excess portion of the section being taken on the line 4 4 ofof the latex on the plates 23 can be stripped Fig. 1; and Fig. 5 is afragmentary cross secaway as far as the abrupt edges 24 of the platestional view, similar to Fig. 3, of a modified form and the excessportion of the latex layer de- 55 posited on the ends onthe areas 33,',34f

.of the bosses 28,' as well as and-35 at the right of the knife edge asillustrated in Fig. l, can betorn away. At the abrupt edges 34 of thesheet, lines of weakness Ywill'develop in the latex Vlayer so that byparting the layer ofV latex at these lines of weakness-two apronssimultaneously deposited on theopposite surfaces of the form willresult. Since thel length of the form is lmaterially greater than itswidth, it will Vbe appreciated that there is a material saving of timevby dipping this form with its major axis in a horizontal position andyet by, the present method an apron of uniform thickness and reinforcedat all its margins can be made. VInstead of using forms provided withVrein- Y forcement-generating means illustrated in Figs.

1 andjfl, the entire margin of the sheet 2IA" comprising the form mayhave a groove 36 formed therein as illustrated in the fragmentarysectional View Fig. 5. It willbe noted from a comparison of Figs. 4and'5r that -the characterV of the marginal reinforcement of the latexVgarment`29al will be modified'as the spacing between the groove and theadjacent edge of the sheet is Varied. J

The articles may be made of liquid latex, vulcanized after drying or maybe made ofliquid latex largely vulcanized in its liquid form; thecoagulation may be effected by straight dipping and drying or bythe acidcoagulation method, ori-in fact, by any of the-methods known in the art.Y Y

The present disclosure of example and it will be understood that therecan be many modifications and variations therein Within therscope of theappended claims without departing from the spirit of the presentinvention.

vWhat I claim:

V1. A form for making relatively long, narrow articles with reinforcedmarginscomprising an elongated sheet of material, said sheet having anarticle reinforcement-generating groove along a substantial portion oftheV margin of one surface of said sheet and a projection on the othersurface of said sheet opposite said groove, and means for supportingsaid sheet with itsY long is given merely by wayV axis in substantiallya horizontal position while a suitable article forming coating is beingdeposited thereon. Y2. A form on which an article-forming coating may bedeposited, comprising a sheet of material, said sheet having an articlereinforce- .Y

ment-generating groove Vin one surface thereof,

and a projection on the other surface of said sheet opposite saidgroove-.,-

y3. A form on which an article-.forming coating maybe deposited,comprising a Vsheet of material, said sheet having an article reinforce-Y ment-generating groove along a margin of one surface of lsaid sheet,said groove at one side thereof terminating in the edge of said sheet,and

a projection on the other surface of said sheetV opposite said groove. Y

4. A form on which an article-forming coatingV may be deposited,comprising a sheet' off` material, an article reinforcement-generatinggroove in one surface' of saidsheet adjacent? an edge thereof, saidgroove being spaced from-"said edgeQand a projection on the-otherVsurface of said sheetropposite -said groove.- Y

5. Avform onwhich an article-forming coating maybe deposited,'comprisinga sheet of marol terial, said sheet having an abrupt edge,v meansY face,a projectionV on the other surface of said sheet opposite said groovefor accumulating a 4reinforcement adjacent the edge of a` portion of thearticle depositedron said other surface, anda raised section on saidfirst-mentioned .surface defining-the outline of a portion of thearticle'de.-

posited on said first-mentioned surface.

ABRAHAM N., SPNLI

